1 Tests that HTMLTableRowElement.insertCell()'s default argument is -1.
3 On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
6 PASS tr.__proto__ is HTMLTableRowElement.prototype
8 PASS cells[0].innerHTML is "0"
9 PASS cells[1].innerHTML is "1"
10 PASS cells[2].innerHTML is "2"
11 PASS cells[3].innerHTML is "3"
12 PASS successfullyParsed is true